[auth] Fix export with invalid algo name (#4712)

## Description
Fixes #4404
## Tests

Author: ua741

auth/lib/models/code.dart

@@ -256,9 +256,9 @@ class Code {
     try {
       final algorithm =
           uri.queryParameters['algorithm'].toString().toLowerCase();
-      if (algorithm == "sha256") {
+      if (algorithm == "sha256" || "algorithm.sha256" == algorithm) {
         return Algorithm.sha256;
-      } else if (algorithm == "sha512") {
+      } else if (algorithm == "sha512" || "algorithm.sha512" == algorithm) {
         return Algorithm.sha512;
       }
     } catch (e) {

auth/lib/onboarding/view/view_qr_page.dart

@@ -28,7 +28,8 @@ class ViewQrPage extends StatelessWidget {
             child: Column(
               children: [
                 QrImageView(
-                  data: code!.rawData,
+                  data: code!.rawData
+                      .replaceAll('algorithm=Algorithm.', 'algorithm='),
                   eyeStyle: QrEyeStyle(
                     eyeShape: QrEyeShape.square,
                     color: Theme.of(context).colorScheme.onSurface,

auth/lib/ui/settings/data/export_widget.dart

@@ -189,7 +189,8 @@ Future<String> _getAuthDataForExport() async {
   String data = "";
   for (final code in allCodes) {
     if (code.hasError) continue;
-    data += "${code.rawData.replaceAll(',', '%2C')}\n";
+    data +=
+        "${code.rawData.replaceAll('algorithm=Algorithm.', 'algorithm=').replaceAll(',', '%2C')}\n";
   }
 
   return data;

auth/lib/ui/settings/data/import/google_auth_import.dart

@@ -118,10 +118,10 @@ List<Code> parseGoogleAuth(String qrCodeData) {
       if (otpParameter.type == MigrationPayload_OtpType.OTP_TYPE_TOTP ||
           otpParameter.type == MigrationPayload_OtpType.OTP_TYPE_UNSPECIFIED) {
         otpUrl =
-            'otpauth://totp/$issuer:$account?secret=$secret&issuer=$issuer&algorithm=$algorithm&digits=$digits&period=$timer';
+            'otpauth://totp/$issuer:$account?secret=$secret&issuer=$issuer&algorithm=${algorithm.name}&digits=$digits&period=$timer';
       } else if (otpParameter.type == MigrationPayload_OtpType.OTP_TYPE_HOTP) {
         otpUrl =
-            'otpauth://hotp/$issuer:$account?secret=$secret&issuer=$issuer&algorithm=$algorithm&digits=$digits&counter=$counter';
+            'otpauth://hotp/$issuer:$account?secret=$secret&issuer=$issuer&algorithm=${algorithm.name}&digits=$digits&counter=$counter';
       } else {
         throw Exception('Invalid OTP type');
       }

auth/pubspec.yaml

@@ -1,7 +1,7 @@
 
 name: ente_auth
 description: ente two-factor authenticator
-version: 4.2.6+426
+version: 4.2.7+427
 publish_to: none
 
 environment: